Lucent Technologies SLC 5 Series - Page 168

Power Up: DLP-521 363-205-401
Page 2 of 2 Issue 7, March 1997
8. Is AC/DC ringing present on
RING GEN1
?
If
NO,
then continue with Step
9.
If
YES,
then proceed to Step
10.
9. Check wiring on power shelf connecting to
RING GEN1
using SD-7C163-01.
Repeat procedure from Step
3
after locating and correcting trouble.
10. Condition DMM to measure DC volts.
11. On
RING GEN1
, connect DMM test leads to −
48V
jack and
GND
jack.
12. Does DMM indicate between −42 and −56 volts?
If
NO,
then continue with Step
13.
If
YES,
then proceed to Step
14.
13. Replace
RING GEN1
and repeat the procedure from Step
3
. If replacement
RING GEN1
−
48V
voltage requirements are not met, proceed to Step
9
.
14. Did any −
20HZ
fuses blow on
RCU
?
If
YES,
then continue with Step
15.
If
NO,
then proceed to Step
16.
15. Replace
RCU
−
20HZ
fuse. If replacement fuse blows, replace
RCU
Reference: DLP-520
16. Have both
3H1 RINGING GENERATOR
s been tested?
If
YES,
then proceed to Step
19.
If
NO,
then continue with Step
17.
17. Unseat
RING GEN1
.
18. Insert second
3H1 RINGING GENERATOR
into
RING GEN2
slot in power
shelf and repeat from Step
3.
19. Reseat
RING GEN1
.
STOP. YOU HAVE COMPLETED THIS PROCEDURE.